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Gas Warning / Advice Notice

A Gas Warning / Advice Notice is the formal document issued by a Gas Safe registered engineer when a gas appliance or installation is found to be unsafe. It classifies the defect as Immediately Dangerous (ID), At Risk (AR), or Not to Current Standard (NCS), and records the action taken to make the situation safe. Engineers have a legal duty to issue this notice and inform the responsible person.

Gas Safety (Installation and Use) Regulations 1998, Gas Industry Unsafe Situations Procedure (GIUSP)Valid: N/A (notice remains in effect until defect is rectified)

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Sample Gas Warning Notice certificate

Sample Gas Warning / Advice Notice certificate created with CertBox, showing the professional PDF layout with defect classification (immediately dangerous, at risk, not to current standard), detailed description of the defect and associated risk, action taken (appliance disconnected, turned off, or left in use with advice)

Sample Gas Warning Notice with fictional data. All personal details shown are fake.

What it covers

  • Defect classification (Immediately Dangerous, At Risk, Not to Current Standard)
  • Detailed description of the defect and associated risk
  • Action taken (appliance disconnected, turned off, or left in use with advice)
  • Warning label attached to the appliance
  • Responsible person informed verbally and in writing
  • Gas Safe Register notification (for ID situations)

Who needs a Gas Warning Notice?

Gas Safe registered engineers (legal requirement to issue)
Landlords
Homeowners
Tenants

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Frequently asked questions about Gas Warning Notice

When must a warning notice be issued?
A Gas Safe engineer must issue a warning notice whenever they find a gas appliance or installation that is classified as Immediately Dangerous (ID) or At Risk (AR). Best practice is to also issue one for Not to Current Standard (NCS) defects.
What is the difference between ID, AR, and NCS?
Immediately Dangerous (ID) means there is an immediate risk to life and the appliance must be disconnected. At Risk (AR) means it is not immediately dangerous but could become so. Not to Current Standard (NCS) means it does not meet current regulations but is not immediately unsafe.
Can a tenant refuse to let the engineer turn off the appliance?
For ID situations, the engineer must disconnect the appliance regardless. For AR, if the responsible person refuses to allow disconnection, the engineer must clearly advise them of the risks and record this on the warning notice.

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